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-rw-r--r--program/include/rcube_shared.inc2
1 files changed, 2 insertions, 0 deletions
diff --git a/program/include/rcube_shared.inc b/program/include/rcube_shared.inc
index 610023f69..f4f23a26b 100644
--- a/program/include/rcube_shared.inc
+++ b/program/include/rcube_shared.inc
@@ -39,6 +39,8 @@ function send_nocacheing_headers()
header("Last-Modified: ".gmdate("D, d M Y H:i:s")." GMT");
header("Cache-Control: private, must-revalidate, post-check=0, pre-check=0");
header("Pragma: no-cache");
+ // Request browser to disable DNS prefetching (CVE-2010-0464)
+ header("X-DNS-Prefetch-Control: off");
// We need to set the following headers to make downloads work using IE in HTTPS mode.
if (rcube_https_check()) {